Power-transmission mechanism



Nov. 4 1924. 1,514,442

C. W. DARROW POWER TRANSMISSION MECHANISM Filed April 28. 1924 2 Sheets-Sheet 3; ja i Nov; 4 .1924. 1,514,442

' c.'w. DARROW I PbwER TRANSMiSSION MECHANISM Filed April 28'. 1924 zsmns-sneez 2 Patented Nov. 4, 1924.

UNITED STATES I v 1,514,442 PATENT v OFFICE.

onns'rnn w. m nnow, or CHICAGO, ILLINOIS.

POWER-TRANSMISSION MECHANISM.

Application filed April as, 1924. Serial No. 709,570.

To all whom it may concern: I

Be it known that I, CHESTER W. DARRow, a citizen of the United States, residing at Chicago, in the county of Cook and the State of Illinois, have invented a certain new and useful Improvement in Power-- Transmission Mechanism, of which the folspect to the prime mover in operating relation. thereto. My invention is" ofparticular utility in the power plant of an automobile, as by it I am enabled to effect, in a simplified manner, the shifting of the speed changing gearing through which the motor of such a plant drives the automobile.

In carrying out my invention in the preferred way'the H-shaped guide for the gear shift leveris dispensed with, the gear shift lever being confined to a single straight line path in accomplishing the various shifts, an important advance in the art that is of especial'advantage in the hands of a beginner. With the device of myinvention it is unnecessary to throw out the clutch in changing gears, the danger of stripping the gears and stalling the'motor being eliminated and which is apt to occur if the movements of the gear shift lever of the prior artare not effected in orderly sequence. v

The invention willbe fully explained in connection with the accompanying drawings,

in which Fig. 1 is a longitudinal sectional view of the preferred form of speed changing gearingand gear shifting mechanism constructed in accordance with the preferred embodiment of this invention;

Fig. 2 is a sectional view on line 2-2 of Fig. 1'; I

Fig. '3 is a sectional view on line 33 of Fig. 1;' t l i Fig. 4 is a sectional view on line 4-4. of Fig.1;and' i Fig. 5 is a view, somewhat diagrammatic, of the gearing, showing the preferred shapes of the gear teeth in the various gear wheels. v

The driving shaft 1 is connected with the engine or motor through any usual or suitable clutch. Ithas one bearing 2 in the gear case 3. The load shaft 4, that shaft pinions'.

in an automobile which leads-to the dif ferential gear that drives the rear, propelling, vehicle wheels, has a bearing5 in said gear case. A spider 6 is keyed upon the driving shaft and on this spider are mounted the individually rotatable bevel pinions 7 of the differential gearing throughwhich the driving shaft 1 turns the unequally diametered spur gear wheels 8 and 9 that are coaxial with and turn upon and with respect to the shaft and with respect to each other, and have their opposing faces made hollow to house said bevel pinions, said gears bein internally in meshwithsaid pur gear 5 is the smaller one of two spur gears and is in constant mesh with another spur gear 10 which is keyed upon the counter shaft 11 which is axially movable within the bearings 12 and 13 in which it also rotates. The larger spur 'gear 9 is in constant mesh with spur gear 14 which is fast upon another counter shaft 15'which is axially movable in thebearings 16, 17 in which it also rotates. The two counter shafts 11 and 15 are thus driven at speeds which. bear a compensating relation by the functioning of the differential 7, any increase in the speed of either counter shaft resulting in the decrease in the speed of the other counter shaft andvice versa.

Spur gear 18 is keyed 'upon shaft 11 and is integral with a spur pinion 19 that is in mesh with a spur gear 20 which drives the spur pinion 21 in a forward direction through a clutch 22. The latter spur pinion is in mesh with a spur gear 23 which turns loosely upon counter shaft 11. The latter spur gear turning at a rate, due to the illustrated selected ratios of the other gear elements in train therewith, which is a little more than one fifth as fast as gear 18. Spur pinion 2A: is of the diameter of pinion 21, these two pinions being fixed.

upon the same shaft 26 which is journalled in the bearings27, 28 andupon which spur gear 20 looselyturns. One member of the clutch 22 turns with the gear ,20 and the complemental member turns with the pinion 21. A spring 29 yieldingly maintains the clutch members together, and permits 30 turns upon a shaft that has bearings 32, 32'.

Spur gear 14, driven by spur gear 9, is fixed upon shaft 15 and drives spur gear 33 through a clutch 34 that has one member fixed upon the former gear and a complementa-l member fixed upon the latter gear. A spring 35 yieldingly maintains these clutch members together, and permits slippage when the driving clutch member has its direction of rotation reversed. The spur gear 33 is integral with a spur pinion 36 that is in mesh with a spur gear 37 which drives spur gear 38 in a forward direction through the intermediation of a clutch 39 which has one member integral with gear 37 and another member integral with gear 38 that is mesh with spur gear 38' which turns loosely upon shaft 15. v A spring 40 yieldingly maintains these clutch members together and permits slippage when the driv ing clutch member has its direction reversed. Spur gear 41 is of the same size as gear 38 and is fixed upon the shaft 42 therewith, this shaft being supported upon bearings 43, 43, the gear 37 turning loosely upon this shaft. The gear 41 is inmesh with spur gear 44 whose shaft is within the bearings 45, 46. The, gear 44 is in mesh with a spur gear 47 that turns loosely upon shaft 15, the speeds of these two gears being the same while their directions are opposite. Springs 48, 49 that are relatively strong and weak respectively, press upon the spur gear'47 respectively to the, right and left. i I

Assuming that the differential pinions are operating as a solid unit and that the gear ratios are as illustrated and described the rates and ratios of revolution of the different gears for each revolution of the driving shaft 1 are as follows 3 On shaft 11,

On shaft 15,

Gear 9 :Gear 14 =1R 123R Gear 33 =2.3R Gear 36 :Gear 37 =2R 1R Gear 38 Gear 38=7I1% 5% I. l. Gear 38 Gear 33 3.6 .1 Gear 38 .8313. Gear 47 .83R

The speed rates of the-gears 33,18, 38', 23, 31 and 47 are, therefore, in terms of the speed rate of the drive shaft at unity, 23R, 1.5R, .83R, .32R and .83 respectively.

The shafts 11 and 15 are capable of a slight longitudinal movement but are nor: mally retained in their regular positions by the springs 50, 50'. By means of the lever 51, and the yokes 52, 52, which fit into the collars 53, 53, a movement of one shaft in one longitudinal direction will result in a movement of the other shaft in the opposite direction. Upon the sides of gears 10 and 14 which are keyed to the shafts are friction disks 54, 55, which, by the movement of the shaft, may be brought into contact with the stationary friction disks 56, 57 respectively.

Gear 58 is shown as being twice the diameter of gears 18, 23, 31. 33, 38', 47;it is capable of sliding longitudinally upon the load shaft 4 upon which it is splined.

Gear 58 may be moved along the shaft 4 by means of the collar 59, into which fits a yoke 60, which is controlledfrom across head 61 which is in turn controlled by the lever 67 through the link 63.

The operation of the mechanism is described as follows: lVhen the gear 58 is in a position half way between gear 23 and gear 31 it is entirely disconnected from the a drive shaft 1, and is in neutral. As gear 58 is moved forward toward the differential 6. 7. 8, 9, it first engages the gear23 and if the drive shaft is rotating and there is a load upon the propeller shaft 4, the gear 58 will remain unmoved, for the gear 8 of the differential will tend toremain stationary while gear 9 through the action of the conical gears 7 .7 will tend to rotate at twice the speed of the differential spider 6 which is driven by the drive shaft 1 and through the action of gear 9 the train of gears on shaft 15 will rotate at twice their normal speed.

As gear 58 is moved further to the right the teeth of the gear 58 which are beveled at the end for ease of connection, (Fig. 5) rub against the teeth of gear 38, also beveled at the end, and this will result in the following events: (a) the slowing down of gear 38due to the friction ofthe teeth with 'gear 58; (b) the pushing of the shaft 15 to the right carrying, with it the friction disk 55 which comes into contact with the friction disk 57; (c) the action of the yoke arm 51 to prevent the shaft 11 from being pushed to the right by the friction between the teeth of gears 58 and 23, thus preventing friction between the disks 54 and 56; (d) the slowing of the shaft 15 by the slight friction of the teeth of gear 38 with those of gear 58, and the much greater slowing action due to the friction of'the disks 55 and 57 will result, by means of the differential, in the motion of the gears of shaft 11; (e) the friction of gear 58 with the moving gear 38 will tend. to set gear 58 into motion; (f) the motion of the gears on shaft 11 of which gear 23 is one will also tend to set gear 58 into motion. As

the speed of gear 23 is increased due to the increased friction on shaft 15 gear 58 with- I gears23 and 38, will rotate at a rate one half the average of the'normal ratesof gears 23 and 38, or at .28 the rate of the By normal rate is here drive shaft 1. meant the rates under the condition that the differential is revolving as a unit.

-To change to intermediate speed the gear 58 is moved from the dotted position toward the right until its teethbegin to rub those of gear 18 which is going at a faster rate than gears 23 or 38. The friction of the teeth of gear 58 with those of gear 18 will tend to slow down the rate of shaft 11 and consequently, through the action of the differential, to increase the rate of shaft 15; thepressure toward the right upon gear 18 will move shaft 11 toward the right and cause the friction disks on that side to engage while at the same time the action of the lever 51 prevents the smaller amount of friction between gears 58 and 38 from carrying shaft 15 to .the -right and producing friction between discs 55 and 57. The friction and slowing of shaft 11 will increase the rate of. shaft 15 and consequently of gear 58' which. is engaged with gear 38 and the two'will engage. But while shaft 15 and gear58 have been increasing in rate, the shaft 11 has been decreasing in rate, yet the gears 58 and 23 have remained engaged: to permit this, the clutch 22 enables gears 23 and 21 to turn at a rate faster than that at which they would normall be driven by the gears19, 20. When the gear 58 first completely engages gear 18,-gears 18 and 23 will necessarily be turning at the same rate of speed and this will continue until gear 58 has been moved far enough to the right to disengage the teeth of gear 23. The position in which gear 58 engages equally gears 23 and 38" and is driven at a rate one halfthe average normal rates of gears 23 and 38, i. e. at a rate-.58

that of the drive shaft, is the intermediate speed.

The same process that occurs in changing from the drive by gears 23 and 38 to gears 38 and 18 takes place in'changing from gears 38' and 18 to gears 18 and 33.- The position between 18 tllldiii is the first position of the high speed, and in this position gear 58 is driven at a rate .95 that of the drive shaft 1. As gear-'58 is mov'cd'stili further to the right lugs 64, (it on the gear wheel engage with similar lugs 65, 65 011 the end of the drive shaft 1 and the propeller shaft 4 will he increasedgfroin a speed of .95R to a speed of 1R, this being per? mittedby the action of the ratchet 3-1. Gear 58 is then pushed still further to the right,

completely disengaging gear 18 and per- 'm1tt1ng the wl'iole gear shifting mechanism to-idle whilethe propeller shaft and the drive shaft are coupled as a single unit; this is the second position of high speed.

To gofrom high speed to neutral the process is'reversed: the beveled ends of the teeth of gears 5s; 18, 23, a1, 33, as, 4?,

diagrammatically illustrated in Fig. 5, permi't ready meshing of the gears in the reverse movement, even whenthe car is standing still. The teethon the side of gear 58 away'froni the differential and the teeth of 23'and38 onthe side toward the differential are beveled to slant only in one direction to prevent the engagement of teeth of gear 23, when moving gear 58 toward the left, in such a manner as to force it in a backward direction relative to gear 18, amotion which would not be permitted by the action of the ratchet 22. The same holds true for the beveling of the teeth of gear 23. Further, the action of the ratchets or clutches will permit the change from high speed to intermediate speed, to low speed and to neutral while the load shaft is going at a high rate 'of speed without any corresponding racing of the engine.

" To go from neutral into reverse the gear 58 is thrown into mesh with gear 31 and then the gear 47, just as was tr ue of the movement into 23 and 38 when going from neutral into low; The action ofthe friction disk 48 permits the same sort of slowing of the faster gear and speeding of the slower gearwhich took place when changing speeds in a forward direction.

Cha n'ges may be made without departing from my invention. v

' Having thus described my invention I claim 1. The combination Witha driving shaft; of two gears rotatable withrespect to each other and with respect to said shaft; gearing driven bysaid shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two countershafts driven, respectively, by the aforesaid two gears; two gears, one on each countershaft; a load shaft; and a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it isadapted to have simultaneous engagement.

other and with respect to said'shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two ears, one on each counter shaft; a load sha t; and a gear turning with and movable along. the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, one of said counter shafts being longitudinally movable; and a friction device into and out of connection with which this counter shaft is brought as it is moved. longitudinally.

3. The combination with a driving,

shaft; of two gears rotatable-with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears one on each counter shaft; a load shaft; and a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said counter shafts being longitudinally movable; and a friction device individual to each counter shaft and into and out of connection with which such shaft is brough as it is moved longitudinally. I

4. The combination with a driving shaft; of two gears rotatable with respect to each other andwith respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; and a gear turning with and move able along theload shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said counter shafts being longitudinally movable; and a friction device individual to each counter shaft and into and out of connection with which such shaft is brought as it is moved longitudinally; and mechanism common to both counter shafts for moving them longitudinally and serving to move each into connection with the friction device individual thereto while moving the other out of connection wit-h the friction device individual thereto.

5. The combination with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; aload shaft; a gear turnmg with and movable along the load shaft to be brought into and out of engagement with the lat-tertwo gears and with which it is adapted to have simultaneous engagement, one of said counter shafts being longitudinally movable; a friction device into and out of connection with which this counter. shaft is brought as it is moved longitudinally; and a spring for moving counter shaft out of connection with said friction device.

6. The combination with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gears. ing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a car turning with and movable along the oad shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each .of said counter shafts being longitudinally movable; a friction device individual to each count-er shaft and into and out of connection with which such shaft is brought as it is moved lon gitudinally; and two springs, each individual to a counter shaft and serving to disconnect such shaft from the friction device individual thereto.

7. The combination with'a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a gear turning with and movable alongthe load shaft to. be-brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said counter shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection with which such shaft is brought as it is moved longitudinally; mechanism common to both counter shafts for moving them longitudinally and serving to move each into conneca counter shaft and serving to disconnect such shaft from the friction device individual thereto.

8. The combination with a driving shaft;

of two gears rotatable with respect to each other and with respect to said shaft; gearin driven by said shaft and constituting a di gears, one on each counter shaft; a load shaft; a gear turning with and movable along thewload shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement; asecondgea'r upon one 'second two gears upon the'latter counter shaftand the gear upon the other counter shaft; and

1 a" clutch included in the gearing driven by said second gear to permit this secondgear to-turnatthe same rate with the othergear upon thesame' counter shaft therewith 9; The combination with a driving 'shaft;/ of two gears rotatable with respect to each other and with respect to said shaft; gear-' ing driven by'sai'd shaftand'constituting a" differential conpling'with aforesaid gears'in mesh therewith; two counter shafts driven,

respectively, by the. aforesaid two gears; two gearsyone'on each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement one of said counter shafts being longitudinally movable; a friction device into and out of connection with which this counter shaft is brought as it is moved'longitudinally; a second gear upon one of said counter shafts; gearing driven by this second gear 'anddrivin'g the other gear upon this shaft at a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the l two gears upon the latter counter shaft andthe gear upon the other countershaft; and a; clutch included in the gearing driven by said second gear to permit'this second gearto turn at the same rate with the other gear upon the samec'ounter shaft therewith.

10. The combination with a driving shaft oftwo gears rotatable with respect to each f other and'with respect to said shaft gear-' in driven bys'a'id'shaft-and constituting a" differential couplingwith aforesaid gears in mesh therewith; two counter shaftsdriven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; v a load shaft;a gea'rturning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it'is adapted'to have simultaneous engagement 1 each of said counter shafts being longitudinally movable;

a friction device individual toeach counter shaft" and into and out of connection with which "such shaft is brought as it is moved 'nection with the'friction. device individual thereto; a second gear upon one of said,

longitudinally; a'second gear upon ions of said counter "shafts; gearing driven by this gears upon the latter counter shaft and the a gear upon the "other/counter shaft; and a clutch included @in the gearing driven by of said counter shafts; gearing driven" by this second gear and driving the other gear upon this shaft at a different speed from-this gear,'the gear*upon the loadshaft V being simultaneously; engageable with the said secondgear to permit this second gear! ft'o turn at the samerate with the other gear upon the same counter shaft'therewith. i

11. Thecombination with a driving shaft; .of'two gearsrotatable with respect to' each other and with respect to said shaft; 'gearing driven by said shaft "and p constituting a differential coupling with aforesaidgears in lmesh" therewith; two" counter shafts *driven'; respectively, by the aforesaid" two gears; two gears, one on eachcounter shaft; alload shaft;a gear turning with an d'movable along the loadshaftto be broughtinto and out of engagement withthelattertwo gears and with'which' it i's'adapted to have simultaneous engagement, each "of {said counter shafts being longitudinally movable;

a friction device-individual to each councounter shafts for moving them longitudinally'and serving tomove-each into connection with the friction device individual thereto while "moving" the other out of concounte'r shafts; gearingdriven by this second gear and driving the'other gearu-pon this shaft at jdifi'e'rent speed fromthis sec- 0nd gear; thejgear (upon the load shaftbe ing "simultaneously engageable with the two gear upon the othercountefr shaft; and a tersh'aftand into'and out of connection with Y which such shaft is brought as it is meved longitudinally; mechanism common to both? gears upon the latter counter shaft and the a clutch included in thegearing driven by said turn at the same rate with the-other gear upon the same counter shaft therewith.

1 *12. The combination: 1 with a driving shaft; of two gears rotatable withrespect to each other and with respectto said shaft;

along the load shaft' to be brought into and out of engagement with the-latter two gears and with which it is adapted toshave simultaneous engagement-"one of said counter" shafts being longitudinally movable; a'fri'e.

tion device into" and out of. connection with which "this counter shaft is brought as it is moved longitudinally; a spring for moving said counter shaft out of-connection'with second gear to permit this second gear -togears; two gears, one on each counter shaft a." 0

load shaft a 'gear'turning with and movable 1 said friction device g a second gear upon one 7 i of said counter shafts;

this second gear to turn at gear upon the same counter shaft; there-v I this second caring dr ven by arand driving the other gear upon'this shaft at a different speed from ar; the gear upon the load shaft being simultaneously engageable with the two gears upon the latter counter shaft andthe gear upon the other counter shaft;

. and a clutch included in thegearing driven by said second ear. to permit this second e same rate with the other with.

- 13.- The combination with a driving mg a differential 'coupling,-.with aforesaid gears in mesh therewith; two counter shafts 20 to each shaft- ,of'two gears rotatable with respect other and with respect to said shaft; aringdriven by said shaft and'constitutdriven, respectively, by. the aforesaid two gearstwo gears, one on each counter shaft; ==ja loa I shaft; a gear turning with and movable along the load shaftto be brought into i and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said counter shafts being longitudinally movable;

-' a friction device individual to each coun-' ter shaft andiinto and out of connection with which such shaft is brought as it is moved longitudinally; two springs, each individualto ,a counter shaft and serving to disconnect such shaft from the friction de vice individual thereto; a second gearupon one of said counter shaft; gearin driven ,by this second gear and'driving't e other gear upon this shaft at a different speed .from this second gear; the gear upon the loadshaft being simultaneously engageable with the two gears upon the latter counter shaft and the gear upon the other counter shaft; and a clutch included in the gearing driven by said second :gear to permit this second gear to turn at the same rate with the therewith.

other gear upon the same counter shaft 14.The combination ,with a driving shaft; of two. gears rotatable with respect to each other and with respect'to said shaft; gearing drivenby said shaft and constituting a. differential coupling with aforesaid gears in mesh therewith; two

- counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted tohave simultaneousengagement, each of said counter shafts being longitudinally movable; a friction device in dividual to each counter shaft and into and out ofconnection with which such shaft is brought as it is moved longitudinally;

mechanism common to both countershafts for mowing them longitudinally and serv-s mg to more each into connection with. the I friction device individual thereto while moving the other out of connection with.

the friction device individual thereto; two springs, each individual to a counter shaft and serving to disconnect such shaft from the friction; device individual thereto; a second gear upon one of said counter shafts;

gear-ing driven by this second gear and driving the other gear upon this shaft at a different speed from this second gear, the

.gear upon the load shaft being; simultaneously engageable'with the two. gears upon the latter counter shaft and the gear upon the other counter shaft;-and a clutch included in the gearing driven by said second gear to permit this second gear to turn at the same rate with the other gear upon the same counter shaft. therewith.

. 15. The combination with a driving shaft;

of two gears rotatable with respect to each other and with respectto said" shaft; gearingdriven by said shaft and constituting a differential-coupling with aforesaid gears in .mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears two gears, one on each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which iti's adapted to aforesaid gears in mesh therewith; two

counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; aloadshaft; a'gear turn-- ing with and movable along the load shaft tobe brought into and outof engagement with the latter two gears and with which it is adapted to have-simultaneous engage, ment, one of said counter shafts being longitudinally movable; a friction device into and out of connection with which this counter shaft is brought as it is moved 1ongitudinally; a second gear upon one of said counter. shafts; and gearingdriven by this second gear and driving the other gear upon this shaft at a different speed from this secondgear, the gear upon the load shaft being simultaneously engageable with the; second gear upon the latter counter shaft and the gear upon the other counter to v andout of engagement with the latter two gears and with which it is adapted: to

shaft.

17. The combination with a driving shaft; of two gears rotatable with respect to each other. andwith respect to said, shaft; gearing driven by said shaft and constituting a differential coupling withaforesaid gears v have simultaneous engagement, each of said counter shafts being. longitudinally movable; a friction device individual-to each counter shaft and into and out ofconnec- 6 tion withwhich .such shaftis brou ht as it is moved lonitudinally; a secon -gearupon one of sai counter shafts; and gearingdriven by this second gear and driving the other gear upon this shaft at a dif- V upon the other counter shaft.

ferent speed from this second. gear, ,the gear upon the load shaft. being simulta neously engageablewith the second gear up. on the latter counter shaft and 7 the gear 18. The combination with .a sta shaft; of two gears rotatable with respecttoeach other and with respect to said'shaft;

, gearing driven by said shaft and constituting a, differential coupling ,with. aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft;

a load shaft; a gear turningwith and movable along the load shaft tobe brought into and out. of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said x counter shafts being longitudinally movable; afriction device individual" to each counter shaft and into and out of connection with which-such shaft is brought. as it is moved longitudinally; mechanism common to both counter shafts for'moving them longitudinally and serving to move each into connection with the friction device individual thereto while moving the other out of connection with the .fri'ctiondevice individual thereto; a second gearupon one of saidcounter shafts; and gearing driven by this second gear and driving the other gear, upon thisshaft at a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the. second. gear upon the latter counter shaft and the gear upon the other counter 19. The combination with a driving shaft; of two gears rotatable withrespect to each other and with respect to said'shaft;

gearing driven by said shaft and constitut-j mg a differential coupling with aforesaid gears in ineshtherewithflwo counter shafts driven, respectively, by the aforesaid two gears; two gears,oneoneach'counter shaft;

aload shaft; a gear'turning, with and movable along the load shaft to be brought into and out ofengagementwith the lattertwo gears'and with which it fis adaptedto have simultaneous, engagement, one of said counter shafts being longitudinally mov able; a friction. device into and out of con qnection with which this counter shaft is brought as ,it I is moved longitudinally a spring for moving said counter shaft out ofconnection with'said friction device; :a

second, gear upon one of said counter shafts; and gearing driven by this second gear and drivin'g the other gear upon this shaft ata different speed from this second gear, the

ously engageable with the second gear uponthe latter. countershaft, and the gearfupon the other counter shaft.

2c.'rhe combination with a",-.(1riving shaft; of two gears rotatable with-respect to each other and with respect to saidfshaft;

ing a differential coupling with aforesaid I gears infmesh therewith two cou'hter shafts driven, respectively, by the aforesaid t'wo gears; two gears, one on each counter shaft;

able alongthe load shaft to be brought into counter shafts being longitudinally movf.

gear/upon the load shaft being simultane- .9 gearing driven by. said sha-ft fand coiistituta load shaft; a gear turning with and movable; a friction device individual to each counter shaft. andlinto and out of co c;

tion 1 with which such shaft is ,broughtllas it is moved longitudinally; two'ispringsg each individual to a countershaft andserv-f ing to disconnect such shaft from the friation. device individual thereto; a second gear uponone of 'said counter shafts; and,

gearing driven by this second gear and d'riving the other gear upon this shaft at a-diiferent speed from this second gear, the gear upon the load shaft being simultaneously engageable with the second gear upon the latter counter shaft andthe gear upon the other counter shaft. f 21. The combination. with a driving shaft; of two gears rotatable with [respect to each. other and with respect to said shaft; gearing driven by said shaft and constituting av differential f coupling with aforesaid gears in mesh therewith; two counter shafts driven,respectively, by the aforesaid two gears; two cars, one on ,each counter shaft; a load shat; agear turning with-and movable along theload shaft-to I adapted to have simultaneous engagement,

each of said counter shafts being longitudidriven by this second gear and driving the nally movable; a friction device individual shaft.

to each counter shaft andinto and out of connection with which such shaft is brought as it is moved longitudinally; mechanism coninioii tobothcounter siiafts for moving theiii longitudinally and serving to move each into connection with the friction device individual thereto'while moving the other out offconnecticn with the friction device individual thereto; two springs, each indi ,vidualto a counter shaft and serving to dis- 22. The combination with a driving shaft; of two gears rotatable with respect to each {other and with respect to said shaft; gearingdriveii by said shaft"andconstituting a differential coupling w th aforesaid gears in mesh therewith; two counter shafts driven,

respectively, by the aforesaid two gears two gears, OliGf'Oll each counter shaft; a" load shaft; a gear turning with and movablealongthe load shaft to bebi'ought into and out ofengageinent with the latter 'two gears and 'witliwliichit is adapted to have simultaneous engagement; ascc nd gearupoii achof said counter shafts; gearing driven by thissecond gear and} drivingtho other gear upon this shaft- 'at a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the twogea rs upon each cou'n'tershaft and theifirst gear upon the other counter shaft;jand clutchincluded in the gearing" "jtlI'lVQll by each second gear to permit this 5 second gear to turn at the same rate with the other'gear upon tlie'same counter shaft therewith. V g i 1 23. The combination with a driving shaft;

- of two gears rotatable with respect to each other and witlnrcspectto said shaft; gear-- ing drivenby said shaftand constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid twogears; two gears, one on'each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought'into and out of'ciigag'en'ient with thelatter two I gears and with which it is adapted to have simultaneous engagement, one of said counter shafts being longitudinally"movable; a friction device'into and out of connection with which this counter shaft is brought as it: is moved"longitudinally; a second gear upon each of said counter'sliafts; gearing 'same' rate with the other other gear upon this shaft at a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the two gears upon each latter counter shaft and the first gear upon the other'countershaft; and a clutch included in the gearing driven by each second gear to permit this second gear to turn at the gear upon the same counter shaft therewith.

The combination with a driving shaft; of two 'geai's rotatable with respect to each other-and with respect to said shaft; gearing driven by said shaft and constitutinga differentialcoupling with aforesaid gears in mesh therewith; two counter shaft-s driven,

respectively, by the aforesaid two gears;

two gears, one-on each counter shaft; a load shaft a gear turning with and movable along theload shaft to be brought into and out of engageinentfwith the latter two gears and with which it is adapted to have simultaneous engagement,each of said counter shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection with which such shaft is brought as it is moved longitudinally; a second gear upon each of said counter shafts; gearing driven by this second gear and driving the other gear upon this'shaft at a different speed from this second gear, the gear uponthe load shaft being simultaneouslyengageable with the two gears upon each'latter counter shaft and the first gear uponthe' other counter shaft; and a. clutch included in the gearing driven by each second gear to permit this second gear to turn at thesame rate with the other gear upon the same counter shaft therewith.

' The combination with a driving shaft; of two gears rotatable with respect to each other withrespect to-said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; twocounter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a*gear turning with and movable along the load shaft to be brought into and out of engageinent'with the latter two gears "andwith which it is adapted to liavesiinultaneous engagement, each of said counter,

shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection withwhich 'shaftsygearing driven by this second gear and driving tlie'other gear upon this shaft at a different speed from this second-gear, the gear upon the load shaft being simultaneously engageable with the two gears upon each latter counter shaft and the first v gears, one on each counter sha 't; a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement one of said counter shafts being-longitudinally movable; a friction device into'and out of connection with which this counter shaft is brou ht as it is moved longitudinally; a spring or moving said counter shaft out of connection with said friction'device; a second gear upon each of said counter shafts; earmg driven by this second gear and driving the other gear upon this shaftat a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the twoears upon each latter counter shaft and the first gear upon the other counter shaft; and a clutch included in the gearing driven by each second gear to permit this second gear to turn at the same rate with the other gear upon the same counter shaft therewith.

27. The combination with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearin driven by said shaft and-constituting a diherentail couplingwith aforesaid gears in mesh, therewith; two counter shafts driven,-

respectively, by the aforesaid two cars; two gears, one on each. counter-sha t; a load shaft, a gear turning with and movable along the load shaft to be brought into and out of enga ement' with the latter two gears and with which it is adapted to have simultaneous engagement, each of said counter shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection withwhich such shaft is brought as it is moved longitudinally; two springs, each individual to a counter shaft and serving to disconnect such shaft from the 'friction device individual,

thereto; asecond gearupon each of said counter shafts; gearing driven by this second ear and driving the other gear upon this s aft at a different speed-from this second ear, the gear upon the load shaft being simultaneously engageable with the two ears upon 'each latter counter shaft and the rst gear upon the other counter shaft; and a clutch included in the gearing driven by each second gear to permit this second gear to turn at the same rate with the other gear upon the same counter shaft therewith 28; The combination with a driving shaft; of'two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears to mesh therewith; two counter shafts driven, respectively, by the aforesaid two ears; two

gears, one on each counter shaft; a load shaft; a ear turning with and movable along the oad shaft to'be brought into and out of engagement with the latter two gears and with which it is adapted to have slmultaneous engagement each of said counter shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection with which such I-shaftis brought as it is moved longitudinally mechanism'common to both counter shafts for moving them longitudinally and .serving'to move each into connection with the friction device individual thereto while moving the other out of connection'with the friction device individual thereto; two springs, each individual to a counter shaft and serving to disconnect such shaft from the friction device individual thereto; a second gear upon each of said counter shafts;

gearing driven by this second gear and driving the other gear upon this shaft at a different'speed from this second gear, the gear upon the loadshaft being simultaneously engageable with the-two gears upon each latter counter shaft and the first ear upon the other counter shaft; and a c utch included in the gearing driven by each second gear to permit this second gear to turn at the same ter shaft therewith.

29. The combination-with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearin drivenby said shaft and constituting a diherential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a car turning with and movable along the oad shaft tobe brought into and out of engagement with the latter two gears and with which it is adapted to have simul taneous engagement; a second gear upon each of sa1d counter shafts; and gearing driven by this second gear and drivin the other ear upon this shaft at a di erent s eed t e load'shaft being simultaneously en age able with the two gears upon each atter counter shaftan'd the first gear upon the other counter shaft; and a clutch included in rate with the other gear upon the same counrom this second gear, the gear upon the gearing driven by each second gear to permit this second gear to turn at the same rate withv the other ear upon the same counter shaft therewith. y r

30. The combinationwith a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearin driven by said shaft andconstituting a di erential coupling with aforesaid gears in mesh therewith; two counter shafts driven,

- respectively, by the aforesaid two gears;

two gears, one on each counter shaft; a load shaft; a car turning with and movable along the oad shaft to be brought m to and out of engagement with'the latter two gears with which it is adapted to have simultaneous engagement, one of said counter shafts being longitudinally movable; a friction device into and out of connection with which this counter shaft isbrought as it is moved longitudinally; a second gear upon each of said counter shafts; gearing'driven by this second gear and driving the other gear upon thisshaft at a different speed from this second gear, the gear upon the load shaft being slmultaneously engageable with the two gears upon each latter counter shaft and the first gear upon the other counter shaft; and

a clutch included in the gearing driven by each second gear to permit this second gear to turn at the same rate with the other gear upon the same counter shaft therewith.

31. The combination with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearin driven by said shaft and constituting a difierential coupling with aforesaid" gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two,

gears;,two gears, one on each counter shaft; 2. load shaft; a gear turning withand movable along the load shaft to be brought into and out of' engagement with the latter two gears and with which it is adapted to have gear to turn at the samejrate with the other gear upon the same counter shaft therewith.

32. The combination with a-driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load counter shafts for moving them longitudi-- nally and serving 'to move each into connection with, the friction device individual thereto while moving the otheroout of con nection with the friction'device individual thereto; a second gear upon one of said counter shafts; and gearingvdriven by this second gear and driving the other gear upon this shaft at adifferent speedifrom this second gear, the gear upon the load shaft being simultaneously engageable with the second gear uponvthe latter counter shaft and the gear upon the other counter shaft.

33. The combination with a drivingshaft; of two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two countershafts driven, respectively, by the aforesaid two gears, two gears, one on each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought into and. out of engagement with the latter two'gears and with which it is adapted to have simultaneous engagement, one of said counter shafts being longitudinally movable; a friction device into and out of connection with which this counter shaft is brought as it is moved longitudinally; a spring for moving said counter shaft out of connection with said frictiondevice; a second gear upon one of said counter shafts; and gearing driven by this second gear and driving the other gear upon this shaft at a different speed from this second gear, the gear uponthe' load shaft being simultaneously engageable with the shaft; a gear turning with and movable along the load shaft to be brought into andsecond gear. upon the latter countershaft and the gear upon the other counter shaft.

34. The combination with a driving shaft; of two gears rotatable'with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; tw'o counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to have simultaneous engagement, each of said coun ter shafts being longitudinally movable; a friction device individual to' each counter" shaft and intoand out of connection with gear upon'this shaftat a-"diiferent speed which such shaft is brought as it is moved longitudinally; two springs, each individual to a counter shafts-and serving to disconnect such shaft fro-mlthe friction device'individual thereto; a second gear upon one of said counter shafts; and gearing driven. by this secondsgear and driving the other fromthis lsecondgear, the gear Iup'on' the a load shaft, being simultaneously engageable- ,with-"the second gear upon the latter coun-' 'ter shaft and thegear upon the other'coun- 'ter'shaft.

35. The combination with a'driving shaft;

. of two gearsrotatable with respect to'each OtherIandWith respect to said shafts; gearing driven by said shaft and constituting a;

differential coupling with aforesaid gears in. ".m'esh f'therewith; two counter shafts driven, respectively, by I the aforesaid two gears; two gears, oneon each counter shaft; a load shaft; a gear turning with andmovable along the load shaft to be brought into and vout of engagement with'th'e latter two gears and with which it is adapted to have .a simultaneous engagement, each of said counter shafts being longitudinally movable;'-a

friction device individual to each counter tion qwithv the friction devi'ce individual l thereto while moving the other out of connection with tllQ'fIlCtlOIl deviceindividual thereto; two isprings, eachfindividual 'toa countershaftand serving to disconnect 'suc'h ,shaft from the friction device individual thereto; a second gearupon one of said coun ter shafts;-and gearing driven by .thissecondi gear and driving the other gear upon this shaft at a different speedfrom this secondcgearythe gear upon the load shaft being simultaneously engageable with the second gear, upon the latter counter shaft andthe "gear upon the other counter shaft.

36.: '1he combination with a driving-shaft; of two gearsrotatable with respect to each other and withrespeet-to said shaft; gear,-

I ,ing driven by said shaft and constituting a adiflerential coupling with aforesaid gears u in mesh. therewith; two. counter shafts driven, respectively, by; the aforesaid two gears; two,gears,'one'oneach counter shaft;

a load shaft; .a' gear turning with and movable along-the load shaft to be brought into and -out" of engagement with the latter two gearsand with which itis adapted 'to have simultaneous engagement; a second" gear upon each of said counter shafts; gear- .ingfdrivenby this second gear and driv- -one=of thecounter shafts. 2,

ing the other gear-upon thisfs'haftat a different.speedfromthis second gear; the gear i upon the load shaft being simultaneously counter shaft and the first gear upon the other'icounter shaft; a clutchincluded in the gearing driven by each second gear to perrnitsthis second gear to turn at tlie' saine rate-rwithwthe other gear upon the 1 same counter shaft "therewith; and 21 slippage clutch'through which one of the two gears firstmentioned drives thesecond geauupon' 37. The combination with a-driving shaft; of twogear s rotatable with respect to e'ach other and with respe cttosaid shaft; gear- ;ing drivenbysa'id shaft and constituting a differential-coupling with "aforesaid gears in mesh therewith; two counter shafts driven, respectively, by'the aforesaid two gears; two gears, oneon each-counter shaft;

.:a load shaft; a gear turning with andfniovable'along theload shaft to be brought 'into andout of engagement with the latter two gears and with which it is adaptedto engageable with the two gears upon each a 1 have simultaneous engagement, oneof said counter shafts being longitudinally movable;

a friction device into and out of connection with which this counter shaft-is brought as it a is moved longitudinally a second agear upon each of' 'said'counter shafts; "gearing driven by this second gear and driving the othergear' upon this .shaftat a different speed from this second gear, the 'igear" upon the load 1 shaft being" simultaneously' engageable 1 with the two gears upon'each latter counter shaft and'athe first gear: u'pon the' other counter shaft; a

clutch included in the gearing driv'enby each second gearwto'permit this secondgear to turn at the' same rate with the other gear upon-1 the *'same counter shaft-therewith;' and a slippage clutch through which one "of the two gears first mentioned drives the second V gear-upon'one'of the counter shafts."

1 38; Thecom'bination' with a drivingshaft;

ofatwof'gears rotatablei with respect to each other and with respect to said shaft"; 'geaifi'n driven by sa1d shaft and constituting a 'di fe'rentia'l coupling with aforesaid gears in =mesh therewith; two counter shaftsdriven,

respectively, by the aforesaid two gears; two gears, one on each countershaft; a load shaft; agear turning with and movable along the loa'dshaftto' be brought into and out ofengagem'ent with the latter two gears and with which it isadapted to have "simultaneous" en-:

gagement, each of said counter shafts being longitudinally movable; afriction device individual to each counter shaft and into and out of connectio'n"'with which such'shaftis brought as it is moved longitudinally; a secondgear upon each of said counter shafts gearing driven 'by this second gear upon-"each of said counter shafts; gearing driven by this second gear and driving the other gear upon this shaft at a different speed rom this second gear, the gear upon vthe load shaft being simultaneously-engageable with the two gearsuupon each latter counter shaftand the first gear uponthe other counter shaft; a clutch included inthe gearing driven by each second gear to permit this second gear to turn at thesame rate wit-b the other gear upon thesame counter and a slippage clutch mentioned drives thesecond gear upon one.

other andwith respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid. gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two

gears, one on each. countershaftya load shaft; a gear turning with and movable along the load shaft to be brought into and out of -engagen1ent .with the, latter two gears and with which, it is ada'ptedto-have simultaneous engagement, each ofsaid counter shafts being longitudinally movable; a friction device individual to each countershaft and into and out of connection with which such shaft is brought as it is moved longitudinally; mechanism-common to both counter shafts for movingthem longitudinally .and serving to move each into connection with the friction device individual thereto while moving theother out ofconnection withthe friction devicei'ndividual thereto; a'second gear upon each .of said counter shafts; gearing driven by this second gear and driving the other gear upon this shaft'at a different speed from thissecond gear, the gear upon the load shaftzbeing simultaneously. engageable withthe two gears upon each latter counter shaft andthe first gear; upon the other counter shaft; a clutch included in the gearing driven by each second gear to permittthis second gear to turn at the same rate with the other gear upon the same counter shaft therewith; and a slippage clutch through which one of the two gears first mentioned drives the second gear upon one of the counter shafts.

40. The combination. with a driving shaft;

of two gears rotatable with respect to each other and with respect-to said shaft; gearing drivenby said shaft and constitutinga differential coupling with aforesaid gears inmesh therewith; two counter shafts driven, respectively, bythe aforesaid two gears .two gears-one on; each counter shaft; :a load shaft; a gear turning with and movable alongtheload shaft to be brought intoand out of-engagement with the latter two gears and withwhich it is adapted to have simultaneous engagement, one of said counter drives a the second shafts being longitudinally movable; a fric-' tion device into'and out of connection with- NVhlCh this counter shaft is brou ht as it is being simultaneously engageable with the two gears upon each latter counter shaft and, the first gear upon the other counter shaft; a clutch included in- 'the gearing driven by each second gear to permit this second gear to turn at the same rate with the other gear upon the same counter shaft therewith; and a slippage clutch through which oneof the two gears first mentioned counter shafts.

4.1. The combination with a driving shaft; of two gears rotatable with respect to each other and with respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in, mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft; a load shaft; a gear turning with andmovable along the load .shaft to be brought into and out of engagement with the latter two gears and with which it isadapted to have simultaneous engagement, each of said counter shafts being longitudinally movable; afriction device individual to each counter shaft and into and'out of connection with which such shaft is brought as it is moved longitudinally two springs, each individual to a counter shaft and serving to disconnect such shaft from the friction deviceindividual thereto; a second gearupon each of said countertshafts; gearing driven by this second gearand driving the other gear upon this shaft at a different speed from this second gear, the gear upon the load shaft being simultaneously engageable with the two gears upon each latter counter shaft and the first gear upon the othercounter shaft; a clutch included in the gearing driven by each second gear to permit this second 42. The combinationwith a driving shaft;

of two gears rotatable withYrespect-to each other and with respect to saidshafts; gearing, driven by said shaft and constituting a respectively, by the aforesaid two gears; two gears, one on each counter shaftpa load shaft; a, gear turning with and movable gear upon one of the differential coupling with aforesaid gears to mesh therewith; two counter shafts driven,

alongthe load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted'to have simu1- taneous engagement, each of said counter shafts being longitudinally movable; a friction device individual to each counter shaft and into and out of connection. with which such shaft is brought as it is moved longitudinally; mechanism common to both counter shafts for moving them 'longi-' tudinally and serving to move each into connection with the friction device individual thereto while moving the other'out of connection with the friction deviceindividual thereto; two springs, each individual to a counter shaft and serving to disconnect such shaft from the friction device individual thereto; a second gear upon each of'said ing slmultaneously ,engageable the two gears uporreach latter counter shaft and the first upon the other counter. shaft; a clutch j included in the gearing driven by each second gear to permit this second gear to turn at the same rate with the-other gear 5 upon the same counter shaft therewith; and

a slippage clutch through which one of'the two gears first mentioned drivesthe second gear upon one of the counter shafts.

43 The combination witha driving shaft;

of two gears rotatable with respect to each other andwith respect to said shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two counter shafts driven," respectively, the aforesaid two gears; two gears, one on each counter shaft;

a load shaft; a gear turning with and movable along 'the load shaft to be brought into and outofi engagement with the latter two gears andwith which it is adapted to have simultaneous engagement; a .second gearv upon each of said counter shafts; and gearother counter shaft; a clutchincluded inxthe ing driven by this second gear and driving the other gear upon this shaft at adiiferent speed from this second gear, the gear upon the load shaft being simultaneously engageablewith the two gears upon each latter counter shaft and the first gearupon the gearing driven by each second gear to permit this second gear to turnat the same rate with the other gear upon the same i counter shaft therewith; and a slippage g clutch through which one of the twogears :of two gears rotatable with respect to each.

first mentioned drives the second gear upon one of the counter shafts. g

44. The combination with a driving shaft;

other and with respect to said shaft; gearingv driven by said shaft and constituting a differential coupling with aforesaid gears in other and with r mesh therewith; two counter shaftsdriven, respectively, by the aforesaid two ears; two gears, one on each counter sha a load shaft; a gear turning with and movable along the load shaft to be brought into and out of engagement with the latter two'gears with which it is adapted to have simultaneous engagement, one of said countershafts being longitudinally movable; afriction device into and out ofconnection. with which this counter shaft is brought as. it is moved 1 longitudinally; a second gear uponeach of said counter shafts; gearing driven by this second gear and driving the other gear upon this shaft at a different speed from this second gear, the gear uponthe load shaft be ing simultaneously engageable with the two gears upon each latter counter shaft and the two gears first mentioned drives thesecond gearupon one of the counter shafts.

45. The combination with 'a driving shaft; of two gears rotatable with respect to each other and with respect'to said shaft; gearing driven by said shaft and constituting a diiferential coupling with aforesaid gears in mesh therewith; two counter shafts driven, respectively, by the aforesaid two gears; two gears,,one on each counter shaft; a load shaft; a gear turning with and movable along the lead shaft to be brought into and out of engagement with the latter two gears and with which it is adapted tohave simultaneous engagement, each of said counter shafts being longitudinally movable; a friction device individual to' each counter shaft and into and out ofconnection with which such shaft is broughtas it is moved longitudinall a second gear upon each of said counter s afts; gearing driven by this second gear and driving the other ear upon this shaft at a different speed rom this second gear, the gear upon the load shaft being simultaneously engageable with the two gears u on eachlatter counter shaft; a clutch. inc uded in the gearing driven byeach second gear to permit the second gear to turn at the, same rate with the other gear upon the same counter shaft.

therewith; and a. slippage clutch through which one of the two gears first mentioned drives the second gear upon one of the counter shafts.

4:6. The combination with a driving shaft; of two gears rotatable with respect to each t to said shaft; gear; ing driven by sai shaft and constltuting a differential coupling with aforesaid ears in mesh therewith; two, counter s afts driven, respectively, by the aforesaid two gears; two gears, one on each counter shaft;

' a load shaft; a gear turning with and mov simultaneous able along the load shafttoibe brought into and out of en-gagement with the latter two gears and'witli which vitis adapted to haye engagement, each of 'said counter'shafts being longitudinally movable; a friction deviceindividual to each counter shaft and into'and out of connec 'tion with which Such shaft is broughtas it is moved longitudinally; mechanism common to both counter shafts for moving them longitudinally and serving to move each into connection with the friction device individual thereto while moving the other out of connection with the friction device individual thereto; a second gear upon one of said counter shafts; and gearing driven by this second gear and driving the other gear upon this shaft at a different speed from this second gean the gear upon the load shaft being simultaneously engageable with p the second gear upon the latter counter shaft and the gear upon th other counter shaft; and a slippage clutch through which one of the two gears first mentioned drives the second gear upon one of the counter shafts.

47. The comhination with a driving shaft;

of two ,g'ears rotatable with respect to each other and with respectto said, shaft; gearing driven by said shaft and constituting a differential coupling with aforesaid gears in mesh therewith; two countershafts driven,

respect-iv ely, by th aforesaid two gears; two gears, one on each counter shaft; a. load shaft; agear turning with and movable along the load shaft to be brought into and out of engagement with the latter two gears and with which it is adapted to havesimuh' taneous engagement, one of said counter "'shaftsbeing longitudinally movable;'a fric tion device into and out ofconnection with which this counter shaft is brought as'it is moved longitudinally ;-a spring formovin said counter shaft-out of connection witi' said friction device; a second gear upon one of said counter shafts; gearingd'riven' by this second gear and driving the other gear ing adifferential coupling withaforesaidupon this shaft at a different speed from this second gear. the gear upon the load shaft being simultaneously engageable with the second gear upon the latter countershaft and the gear upon the other counter shaft;

and a slippage clutch through one of' the two gears first mentioned drives the second gear upon one of the counter shafts.

4:8. The combination -with F a driving shaft; of two gears rota-table with respect to each other and with respect to said shaft;-

gearing driven'by saidshaft and constitutgears to mesh therewith; two counter shafts driven; respectively, by the aforesaid two gears; two gears, one on each counter shaft;

a load shaft; a gear turning with and movable alongthe load shaft to hobrought into and out of engagement withfthc, lattentwo gears amlwith whichtit is adapted tohave sin'iultaneous engagement, each, of .said counter shafts being.-longitudinally movable; 'afriction device individual toeach. counter shaft and into and out of connectionwith which such shaft is brought [as it is movedlongitudinally; twosprings', each individual to a counter-shaft and serving to disconnect such shaft from the friction device individual thereto; a second gear upon one [of said 'coun ter, shafts; gearing driven by this second gear and clriving'the other gear "upon this shaft at a different speed from this secondQge-ar, the gear upon; the load shaft being simultaneously engageable with the secondgear upon thelatte'r counter shaftandjthe gear upon the'othercountcr shaft; and a slippage clutch through one of the two goals first mentioned drives the secondfgear'u'pon one of the counter shafts.

l9. 'Thecombination with. a (lriving shaft;

of two gear's rotatable with respect to each in mesh therewith; two counter shafts driv en, respectively, by 'the' aforesaid two gears;"twogears, one'on each counter shaft; a load shaft; a gear turning with andmovable along the load shaft to be brought into and outof engagement with the latter two gears and withwhich it is adapted 'to have' simultaneous engagement, each Q said countersha'fts being longitudinally movable: a friction device individualto each counter shaft and into and'out of connection. with which such shaft isbrought as it is moved longitudinally; mechanism com- 'by this second gear and driving the other gear l'lpou this shaft at a"different speed other and with respect to said shaft; 'gear- I 11"l 1i (l I1Vel 1 by said shaft and. constituting a differential coupling with aforesaid gears from this" second gear. the gear uponthe' load shaft-being simultaneously engageable with tho second gear upon the'latter coun-' ter shaft'and the gear upon theot'her' c0un-' fer shaft; and a slippage clutch through which one of the two gears first mentioned drives thc'second gear upon one'ofthe counter shafts. I I

'50. The combination with a driveshaft; of-a load shaft; two rotatable gears; gearing in connection with one of said shafts and I in-'me'sh with said gears and constituting.

therewith a diiferential coupling; and an, additional gear in connection with the other of said shafts and connectibie with each of said two gears severally and to gether,

51. The combination with a drive shaft;

'of a load shaft; two rotatable gears; gearing in connection with, one of said shafts said two gears severally and together; and friction means for checking the rotation of either of the first aforesaid two gears when said additional gear is connected with the other of the first aforesaid gears.

53. The combination with a drive shaft; of a load shaft; two rotatable gears; gear ing in connection with one; of said shafts and in mesh with said gears and constituting therewith a differential coupling; an

additional gear; means forconnecting the additional gear with one ofthefirstaforesaid gears severally and with bothof the first aforesaid gears together; and friction means for checking the rotation of theother of the first aforesaid gears when'the one is severally .-onnected with said additional "ear. :4. The combination with a drive shaft;

ing in connection with one of saidshafts and in mesh with said gears and constitut ing therewith a differential coupling; an additional gear; means for connecting the additional gear with oneof the first aforesaid gears severally and with both of the first aforesaid gears together; said connecting means includingtwo connected gears; I

one in connection with one of the first aforesa d gears and the other in separable con-f nection with said additional gear; a slip-,

of a. load shaft; two rotatable gears; gearpage clutch; and a gear connected with said clutch and differing in speed therefrom, said additional gear being simultaneously connectible with that one ofthe the latter of said connected gears through.

aforesaid connected gears 'thatis connected it with the additional gear and the gear that is brought into connection by'said clutch.

In witness whereof, I hereunto subscribe my name; 1

CHESTER Dimjow. 

